Food And Life: The Yearbook Of Agriculture: 1939 by Wallace, Henry A - 1939

Washington D C: Government Printing Office, 1939. 1st Edition 1st Printing. Hardcover. Good. Has edge and corner wear. Small rip on bottom edge of spine. 1165 pages Publisher: United States Department of AgricultureYear Edition edition (1939) ASIN: B000C7OB56 Product Dimensions: 9.1 x 6.1 x 2.1 inches, Shipping Weight: 3.8 poundsUSDA focus on nutrition - animal and human. OF ALL the sciences and arts one of the greatest is the feedingof animals and human beings. Forty years ago the scientiststhought the problem was simple-discover the needs for protein, fats, carbohydrates, and a few minerals, analyze the foods for these substances, and then so blend the foods as to furnish anadequate supply of each. Today we know that there is much more to it than this. The old science is still fundamental, but the new science is continually adding to it knowledge of a whole array of substances-minerals, vitamins, amino acids-needed by the body. In ordinary diets, both animal and human, that contain a wide variety of natural foods, most of the essential substances arepresent in adequate quantities. But under certain conditions, when the choice of foods is limited, the diets customarily followed cause inefficiency, sickness, or even premature death. The lack of common-sense knowledge of nutrition even amongmany well-to-do people in the United States is appalling. Thereare many kinds of "hidden hungers" which the experienced person can read in the faces and attitudes of the undernourished. Peaked faces, bowlegs, and shaky nervous systems are only afew of the manifestations. Two-thirds of this book deals with the nutrition of animals and only one-third with that of human beingsnevertheless, even the animal section contains much information of fundamental value with regard to human nutrition. The reverse istrue too. The animal body and the human body are astonishingly alike in their reactions to the necessary substances in foods. The modern knowledge of human nutrition is based to a large extent on animal experimentation. Illustrated-9.1 x 6.1 x 2.1 inches, 1165 pages